which of the following statements best describes the significance of meiosis in human sexual reproduction?

a ) meiosis causes an increase in genetic variation, because of the crossing over of genetic material between homologous chromosomes
b ) meiosis causes a decrease in genetic variation, because of polyplod gametes
c ) meiosis causes an increase in genetic variation, because of non-disjunction of homologous chromosomes.
d ) meiosis causes a decrease in genetic variation, because of the creation of diploid (2N=46)

Chromosomes.

The correct answer is:
a) meiosis causes an increase in genetic variation, because of the crossing over of genetic material between homologous chromosomes.